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Solve using the elimination method 3x+5y=9 X-20y= -62
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1 vote
Solve using the elimination method 3x+5y=9
X-20y= -62

User Rory MacLeod
by
7.4k points

1 Answer

6 votes
3x+5y=9 and x-20y=-62
Multiply the first equation by -4
-4(3x+5y=9) = -12x-20y=-36

Then subtract the two equations:

-12x-20y=-36
-(x -20y=-62)
-13x+0y=26

-13x=26
x=-2

3(-2)+5y=9
-6+5y=9
5y=15
y=3

User Rashi Karanpuria
by
8.0k points
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